engine overheat FORD MUSTANG 2021 Owners Manual

Quick Action Menus
See Information Displays (page 99).
HORN Press on the center of the
steering wheel near the horn icon
to activate the horn.
SWITCHING THE HEATED
STEERING WHEEL ON AND OFF
(IF EQUIPPED) Touch the button to switch the
heated steering wheel on and
off.
Note: You can use the heated steering
wheel only when the engine is running.
Note: The system uses a sensor and is
designed to control the temperature of the
steering wheel and to prevent it from
overheating.
Note: In warm temperatures, the steering
wheel quickly reaches its maximum
temperature and the system reduces the
current to the heating element. This could
cause you to think that the system has
stopped working but it has not. This is
normal.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Steering WheelE248531 E270945

Blind Spot Information System
Indicator (If Equipped)
It illuminates when you switch
the system off.
See
Blind Spot Information
System (page 196).
Brake System Warning Lamp WARNING:
Driving your vehicle
with the warning lamp on is dangerous.
A significant decrease in braking
performance may occur. It may take you
longer to stop your vehicle. Have your
vehicle checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
Note: Indicators vary depending on region.
This lamp is a dual function lamp and will
illuminate when:
• You apply the parking brake with the
ignition on.
• Your vehicle has a brake fault or low
brake fluid level, regardless of parking
brake position. If the lamp illuminates when you
are moving, you may have the
parking brake applied. Make sure
the parking brake is off. Have
your vehicle checked as soon as
possible if the lamp continues to
illuminate.
Cruise Control Indicator It illuminates when you switch
the system on.
See
Switching Cruise Control
On and Off (page 184). Direction Indicator It illuminates when the left or
right direction indicator or the
hazard warning flasher is turned
on. Flashes during operation. An increase
in the rate of flashing warns of a failed
indicator bulb.
Door Ajar Warning Lamp Displays when the ignition is on
and any door is not completely
closed.
Engine Coolant Temperature
Warning Lamp If it illuminates when your vehicle
is moving, this indicates that the
engine is overheating. Stop your
vehicle as soon as it is safe to do so and
switch the engine off. Have your vehicle
checked as soon as possible.
Fasten Seatbelt Warning Lamp It illuminates and a chime
sounds until you fasten the
seatbelts.
Front Fog Lamp Indicator (If Equipped) It illuminates when you switch
the front fog lamps on.
Heads Up Display
(If Equipped) A red beam of lights will
illuminate on the windshield in
certain instances when using
adaptive cruise control or the collision
warning system. It will also illuminate
momentarily when you start your vehicle
to make sure the display works.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Instrument ClusterE151262 E270480 E71340 E71880 E156133

Doors and Locks
Action
Message
The driver door is not completely closed.
Driver Door Ajar
The passenger door is not completely closed.
Passenger Door
Ajar
The trunk is not completely closed.
Trunk Ajar
The hood is not completely closed.
Hood Ajar
The system has disabled the door switches.
Switches Inhibited
Security Mode
Drive Control Action
Message
Indicates that one or more of the conditions required to change
drive modes has a fault. If issues persist see your authorized dealer.
Drive Mode Not
Available
Electronic Stability Control Action
Message
The system detects a malfunction due to a blocked sensor.
Service Advan-
ceTrac
The status of the system after you switch it off.
AdvanceTrac Off
The status of the system after you switch it on.
AdvanceTrac On
The system is in sport mode.
AdvanceTrac
SPORT MODE
Engine Action
Message
The engine is overheating and the power has been reduced to assistin lowering the temperature. Stop in a safe place as soon as it is possible.
Power Reduced to
Lower Engine Temp
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Information Displays

cushion. This can cause the heated seat
to overheat. Do not puncture the seat
with pins, needles or other pointed
objects. This damages the heating
element and can cause the heated seat
to overheat. An overheated seat may
cause serious personal injury.
Note: Do not do the following:
• Place heavy objects on the seat.
• Operate the seat heater if water or any
other liquid spills on the seat. Allow the
seat to dry thoroughly.
• Operate the heated seats unless the
engine is running. Doing so can cause
the battery to lose charge. Press the heated seat symbol to cycle
through the various heat settings and off.
More indicator lights indicate warmer
settings.
Cooled Seats
The cooled seats only function when the
engine is running. Press the cooled seat symbol to cycle
through the various cool settings and off.
More indicator lights indicate cooler
settings.
If the engine falls below 350 RPM while
the cooled seats are on, the feature turns
itself off. You will need to reactivate it.
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2.
Locate the white release lever and slide
the lever forward when pulling the
gearshift lever out of the park (P)
position and into the neutral (N)
position.
3. Reinstall the chrome bezel and the gearshift bracket.
4. Start your vehicle and release the parking brake.
Note: If you use this procedure, contact an
authorized dealer as soon as possible.
Note: For some markets, this feature is
disabled. Automatic Transmission Adaptive
Learning
This feature is designed to increase
durability and provide consistent shift feel
over the life of your vehicle. A new vehicle
or transmission may have firm or soft
shifts. This operation is normal and does
not affect function or durability of the
transmission. Over time, the adaptive
learning process fully updates transmission
operation.
If Your Vehicle Gets Stuck in Mud
or Snow
If your vehicle gets stuck in mud or snow,
you may rock it out by shifting between
forward and reverse gears, stopping
between shifts in a steady pattern. Press
lightly on the accelerator in each gear.
Note:
Do not rock your vehicle if the engine
is not at normal operating temperature or
damage to the transmission could occur.
Note: Do not rock your vehicle for more
than a minute or damage to the
transmission and tires could occur, or the
engine may overheat.
TECHNICAL SPECIFICATIONS - MACH 1 Description
Item
Tremec 6-speed manual with 215 millimeter dual clutch and dual mass flywheel.
Transmission
3.731
Driveshaft Rear Axle
Ratio
Gear
Gear Ratios 3.25
1st
2.23
2nd
1.61
3rd
1.24
4th
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing TransmissionE174501

When you override the system,
the green indicator light
illuminates and the vehicle
image does not appear in the information
display.
The system resumes operation when you
release the accelerator pedal. The vehicle
speed decreases to the set speed, or a
lower speed if following a slower vehicle.
Changing the Set Speed
• Press SET+ or SET- to change the set
speed in small increments.
• Press the accelerator or brake pedal
until you reach the desired speed. Press
SET+
or SET-.
• Press and hold
SET+ or SET- to
change the set speed in large
increments. Release the control when
you reach the desired speed.
The system may apply the brakes to slow
the vehicle to the new set speed. The set
speed displays continuously in the
information display when the system is
active.
Canceling the Set Speed
Press
CNCL or tap the brake pedal. The
set speed does not erase.
Note: For vehicles with manual
transmission, if you press the clutch pedal
for an extended period, this action also
cancels the set speed.
Resuming the Set Speed
Note: Only use resume if you are aware of
the set speed and intend to return to it.
Press
RES. Your vehicle speed returns to
the previously set speed and gap setting.
The set speed displays continuously in the
information display when the system is
active. Automatic Cancellation
Note:
If the engine speed drops too low, an
audible warning sounds and a message
appears in the information display.
Automatic braking releases.
The system does not operate below
12 mph (20 km/h)
.
Hilly Condition Usage
Note: An audible alarm sounds and the
system shuts down if it applies brakes for
an extended period of time. This allows the
brakes to cool. The system functions
normally again after the brakes cool.
Select a lower gear when the system is
active in situations such as prolonged
downhill driving on steep grades, for
example in mountainous areas. The
system needs additional engine braking in
these situations to reduce the load on the
vehicle ’s regular brake system to prevent
it from overheating.
Switching Adaptive Cruise Control
Off
Note: You erase the set speed and gap
setting when you switch the system off.
Press
OFF when the system is in standby
mode, or switch the ignition off.
Detection Issues WARNING:
On rare occasions,
detection issues can occur due to the
road infrastructures, for example bridges,
tunnels and safety barriers. In these
cases, the system may brake late or
unexpectedly. At all times, you are
responsible for controlling your vehicle,
supervising the system and intervening,
if required.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Cruise ControlE144529

When Towing a Trailer
•
Do not drive faster than 70 mph
(113 km/h) during the first 500 mi
(800 km).
• Do not make full-throttle starts.
• Check your hitch, electrical connections
and trailer wheel lug nuts thoroughly
after you have traveled 50 mi (80 km).
• When stopped in congested or heavy
traffic during hot weather, place the
transmission in park (P) or neutral (N)
to aid engine and transmission cooling
and to help air conditioning
performance.
• Switch off the speed control with
heavy loads or in hilly terrain. The
speed control may turn off
automatically when you are towing on
long, steep grades.
• Shift to a lower gear when driving down
a long or steep hill. Do not apply the
brakes continuously, as they may
overheat and become less effective.
• If your transmission is equipped with a
Grade Assist or Tow/Haul feature, use
this feature when towing. This provides
engine braking and helps eliminate
excessive transmission shifting for
optimum fuel economy and
transmission cooling.
• Allow more distance for stopping with
a trailer attached. Anticipate stops and
brake gradually.
• Avoid parking on a slope. However, if
you must park on a slope:
1. Turn the steering wheel to point your vehicle tires away from traffic flow.
2. Set your vehicle parking brake.
3. Place the automatic transmission in park (P) or manual transmission in a
low gear. 4. Place wheel chocks in front and back
of the trailer wheels. Chocks are not
included with your vehicle.
Launching or Retrieving a Boat or
Personal Watercraft (PWC)
Note: Disconnect the wiring to the trailer
before
backing the trailer into the water.
Note: Reconnect the wiring to the trailer
after
removing the trailer from the water.
When backing down a ramp during boat
launching or retrieval:
• Do not allow the static water level to
rise above the bottom edge of the rear
bumper.
• Do not allow waves to break higher
than
6 in (15 cm) above the bottom
edge of the rear bumper.
Exceeding these limits may allow water to
enter vehicle components:
• Causing internal damage to the
components.
• Affecting driveability, emissions, and
reliability.
Any time the rear axle submerges in water,
replace the rear axle lubricant. Water may
contaminate the rear axle lubricant, which
is not a normal maintenance inspection
item unless there is a possibility of a leak
or other axle repair is required.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Towing

REDUCED ENGINE
PERFORMANCE
WARNING: If you continue to drive
your vehicle when the engine is
overheating, the engine could stop
without warning. Failure to follow this
instruction could result in the loss of
control of your vehicle.
If the engine coolant temperature gauge
needle moves to the upper limit position,
the engine is overheating. See Gauges
(page 90).
You must only drive your vehicle for a short
distance if the engine overheats. The
distance you can travel depends on
ambient temperature, vehicle load and
terrain. The engine continues to operate
with limited power for a short period of
time.
If the engine temperature continues to rise,
the fuel supply to the engine reduces. The
air conditioning switches off and the engine
cooling fan operates continually.
1. Gradually reduce your speed and stop your vehicle as soon as it is safe to do
so.
2. Immediately switch the engine off to prevent severe engine damage.
3. Wait for the engine to cool down.
4. Check the coolant level. See
Engine
Coolant Check (page 264).
5. Have your vehicle checked as soon as possible. Reduced Vehicle Top Speed
Your vehicle's ability to reach and maintain
top speed is partially dependent upon
ambient temperature. Under certain
environmental conditions, your vehicle's
top speed may be reduced to protect
powertrain components.
ECONOMICAL DRIVING
Fuel economy is affected by several things
such as how you drive, the conditions you
drive under and how you maintain your
vehicle.
There are some things to keep in mind that
may improve your fuel economy:
•
Accelerate and slow down in a smooth,
moderate fashion.
• Drive at steady speeds.
• Anticipate stops; slowing down may
eliminate the need to stop.
• Combine errands and minimize
stop-and-go driving (When running
errands, go to the furthest destination
first and then work your way back
home).
• Close the windows for high-speed
driving.
• Drive at reasonable speeds.
• Keep the tires properly inflated and use
only the recommended size.
• Use the recommended engine oil.
• Perform all regularly scheduled
maintenance.
There are also some things you may want
to avoid doing because they reduce your
fuel economy:
• Avoid sudden or hard accelerations.
• Avoid revving the engine before turning
off the car.
• Avoid long idle periods.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Driving Hints

It is very important to use prediluted
coolant approved to the correct
specification in order to avoid plugging the
small passageways in the engine cooling
system. See Capacities and
Specifications (page 335). Do not mix
different colors or types of coolant in your
vehicle. Mixing of engine coolants or using
an incorrect coolant may harm the engine
or cooling system components and may
not be covered by the vehicle Warranty.
Note: If prediluted coolant is not available,
use the approved concentrated coolant
diluting it to 50/50 with distilled water. See
Capacities and Specifications (page 335).
Using water that has not been deionised
may contribute to deposit formation,
corrosion and plugging of the small cooling
system passageways.
Note: Coolants marketed for all makes and
models may not be approved to our
specifications and may cause damage to
the cooling system. Resulting component
damage may not be covered by the vehicle
Warranty.
If the coolant level is at or below the
minimum mark, add prediluted coolant
immediately.
To top up the coolant level do the
following:
1. Unscrew the cap slowly. Any pressure escapes as you unscrew the cap.
2. Add prediluted coolant approved to the correct specification. See
Capacities and Specifications (page
335
).
3. Add enough prediluted coolant to reach the correct level.
4. Replace the coolant reservoir cap. Turn
the cap clockwise until it contacts the
hard stop. 5. Check the coolant level in the coolant
reservoir the next few times you drive
your vehicle. If necessary, add enough
prediluted engine coolant to bring the
coolant level to the correct level.
If you have to add more than
1.1 qt (1 L) of
engine coolant per month, have your
vehicle checked as soon as possible.
Operating an engine with a low level of
coolant can result in engine overheating
and possible engine damage.
In case of emergency, you can add a large
amount of water without engine coolant
in order to reach a vehicle service location.
In this instance, qualified personnel:
1. Must drain the cooling system.
2. Chemically clean the coolant system.
3. Refill with engine coolant as soon as possible.
Water alone, without engine coolant, can
cause engine damage from corrosion,
overheating or freezing.
Do not use the following as a coolant
substitute:
• Alcohol.
• Methanol.
• Brine.
• Any coolant mixed with alcohol or
methanol antifreeze.
Alcohol and other liquids can cause engine
damage from overheating or freezing.
Do not add extra inhibitors or additives to
the coolant. These can be harmful and
compromise the corrosion protection of
the coolant.
Recycled Coolant
We do not recommend the use of recycled
coolant as an approved recycling process
is not yet available.
Note: Dispose of used coolant in the
appropriate manner.
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Maintenance

Follow your community's regulations and
standards for recycling and disposing of
automotive fluids.
Severe Climates
If you drive in extremely cold climates:
•
It may be necessary to increase the
coolant concentration above 50%.
• A coolant concentration of 60%
provides improved freeze point
protection.
• Coolant concentrations above 60%
decrease the overheat protection
characteristics of the coolant and may
cause engine damage.
If you drive in extremely hot climates:
• You can decrease the coolant
concentration to 40%.
• A coolant concentration of 40%
provides improved overheat protection.
• Coolant concentrations below 40%
decrease the overheat and corrosion
protection characteristics of the
coolant and may cause engine
damage.
Vehicles driven year-round in non-extreme
climates should use prediluted coolant for
optimum cooling system and engine
protection.
Coolant Change
At specific mileage intervals, as listed in
the scheduled maintenance information,
the coolant should be changed. Add
prediluted coolant approved to the correct
specification. See Capacities and
Specifications (page 335). Fail-Safe Cooling
Fail-safe cooling allows you to temporarily
drive your vehicle before any incremental
component damage occurs. The fail-safe
distance depends on ambient
temperature, vehicle load and terrain.
How Fail-Safe Cooling Works If the engine begins to overheat,
the coolant temperature gauge
moves toward the red zone:
A warning lamp illuminates and
a message may appear in the
information display.
If the engine reaches a preset
over-temperature condition, the engine
automatically switches to alternating
cylinder operation. Each disabled cylinder
acts as an air pump and cools the engine.
When this occurs, your vehicle still
operates, however:
• Engine power is limited.
• The air conditioning system turns off.
Continued operation increases the engine
temperature, causing the engine to
completely shut down. Your steering and
braking effort increases in this situation.
When the engine temperature cools, you
can re-start the engine. Have your vehicle
checked as soon as possible to minimize
engine damage.
When Fail-Safe Mode Is Activated WARNING: Fail-safe mode is for
use during emergencies only. Operate
your vehicle in fail-safe mode only as
long as necessary to bring your vehicle
to rest in a safe location and seek
immediate repairs. When in fail-safe
mode, your vehicle will have limited
power, will not be able to maintain
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Mustang (CZG) Canada/United States of America, Vehicles Built From: 14-09-2020, enUSA, Edition date: 202010, Second-Printing Maintenance